/Engine/Source/Developer/WidgetRegistration/Public/Layout/SeparatorBuilder.h
Binds the Visibility of the Separator to aTAttributefor continuous update.
thisFSeparatorBuilderto enable cascading.
[FSeparatorBuilder](API\Developer\WidgetRegistration\Layout\FSeparatorBuilder) & BindVisibility ( [TAttribute](API\Runtime\Core\Misc\TAttribute)< [EVisibility](API\Runtime\SlateCore\Layout\EVisibility) > NewVisibility )